“ADSORPTION PROPERTIES OF SILICAS WITH COVALENTLY ATTACHED COMPLEXING GROUPS TOWARDS Zn(ІІ), Hg(ІІ), Fe(ІІІ), Cu(ІІ), Cd(ІІ) AND Pb(ІІ) IONS: UDC 543.43:546.45”. 2010. Bulletin of the Taras Shevchenko National University of Kyiv. Chemistry 48 (1): 15-18. https://chemistry.bulletin.knu.ua/article/view/8306.